1) Right-click the prop and select Mirror:
Or go to More Options and click on the Mirror icon:
2) The prop is now flipped and faces the opposite way:
There are two-options to flip characters: Mirror and Flip Action.
1) Right-click on the character (or go to More Options) and select Mirror:
2) The character is mirrored and all accessories are inverted after the flip. The image below shows before and after comparison:
1) Right-click on the character (or go to More Options) and select Flip Action:
2) Whichever direction the character is facing, all details - pockets, scarves, and hair - are all styled in the same way for seamless movement. The image below shows before and after comparison:
For more information, check this article.